OK, I own junk. Free junk that I have made some use of, or built from discarded parts, even made a bill or two on, so don't laugh. (My other PC is a 3.0 ghz AMD)Lol. I have a complete HP vectra series 3 5/75 with memory maxed out. It actually performs better than I expected. I know that with the vectra 5/90, changing processors was just a matter of a jumper setting. I have placed a 90 mhz pentium in my 5/75, but bios still says it's only 75 mhz. Bios won't let me change that setting, so I'm figuring, it too has a jumper setting to use the 90mhz processor. It already uses it, but like I said, bios says it's only 75. Anyone know how to make this thing run at 90 mhz? even the vagest idea is welcome.